Radiation effects on the spectral response of HgCdTe

We present a theoretical model for the effects of electron irradiation on the bulk electronic energy band parameters of HgCdTe. The material is treated as degenerate. We predict irradiation induced changes in the shape of spectral response and resolve apparent inconsistencies in the HgCdTe photoresponse data. Qualitative, overall changes in photoconductive detector response are predicted and we find a general trend that short wavelength materials are less susceptible to the effects of radiation.